[Python-Dev] Deallocation of a pointer not malloced, any tips?
kumar.mcmillan at gmail.com
Wed Apr 25 01:12:16 CEST 2007
On 4/20/07, Josiah Carlson <jcarlson at uci.edu> wrote:
> You may want the python-list mailing list or the equivalent
> comp.lang.python newsgroup, unless this is a bug with Python itself (you
> may try running Python 2.4.4, which is the next bugfix of the Python 2.4
yes, seems like it's either a bug in python or the mac os x malloc library.
> Regardless, you can help those who want to help you by providing the
> code that you have written that causes the error. A doubly nested
> try/except isn't all that exciting, so I would guess many would be
> surprised that you are getting double free errors.
again, sorry for being vague. i tried my best at reproducing it in a
test case but couldn't. However, I finally experimented with trying
to force deallocation within the block of code and got something that
Here is a very small portion of it, with the fix, which was putting a
ref to the exc_info vars outside the tries and specifically del'ing
them in the finally block:
def load_or_rescue(self, load):
etype, val, tb = None, None, None
except Exception, exc:
etype, val, tb = sys.exc_info()
if not self.rescue_load((etype, val, tb), exc):
log.critical("EXCEPTION %s while processing %s",
raise exc, None, tb
except NonFatalError, e:
del etype, val, tb
to put this in perspective a little more, the warning/crash happens
when the code is getting called more or less like this...
for row in self.file_reader(fileobj):
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